New js440 owner, need info.

I just bought two js400's, a 79 and 83. Im new to the standup game so I need info on these guys and some aftermarket stuff I should do to them. I also need a battery for one, whats a brand you guys recommend?

I can't tell you much about the standups, but I'd recommend that you get a sealed battery. There are lots of brands and places to get them. The best thing to do to extend the life of the battery is to charge it when it's being stored. Plug the charger into a timer and only charge it about 15 minutes per day. I got NINE YEARS out of my original Yuasa battery in my Ultra by doing this.